Examples do not validate by api/jsonschema/schema.json

[brabster]

Summary

Content of examples on master should validate against the JSON schema on master

Diagnostics

Issues with

• string-or-int (eg. for port numbers) - can be fixed by setting schema type to "type": ["string", "int"]
• string-or-number (eg. workflow parameters defaults & values) - can be fixed by setting schema type to "type": ["string", "number"] - are they parsed or should these really be limited to strings?
• int64 and int32 as "format" for "type":"integer" not valid JSON schema - remove format keys
• examples/memoize-simple.yaml doesn't validate, io.k8s.api.core.v1.ConfigMapKeySelector is missing property "key"
• a couple of examples have naked keys and need data structures [] or {} to be specified

Incoming PR has a diff showing changes to fix - not sure whether the changes need to be made directly in the schema or in some code that generates the schema

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